Being that your question is subjective in nature, it's difficult to quantify the number of "times." I will say this though, I think it's very important that you view your friend as ob
After that he/she aren't defined as friends.
If you can't trust them, time to give them some space. Not be rude, just don't hang out w/ them much.
Depends on the friend and the situation.
Don't blame me. I didn't vote for Obama the first time.
1 time. Then if they're unlucky they'll get a punch to the face and a kick to their head.
once (if it wasn't for my own good or they had a damned good excuse)